They are not going away until Exchange 13, not the next version.

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Milly Staples [MVP - Outlook]
Post all replies to the group to keep the discussion intact. All
unsolicited mail sent to my personal account will be deleted without
reading.
After furious head scratching, Bob Reasoner asked:
| In previous versions of Outlook (prior to 2003 or XP SP4) direct
| booking of an appointment in a resource calendar (double clicking the
[quoted text clipped - 15 lines]
| button, follow this link to open the suggestion in the Microsoft
| Web-based Newsreader and then click "I Agree" in the message pane.
http://www.microsoft.com/office/community/en-us/default.mspx?mid=ce0552b2-a2a6-4
f0b-8b83-289a8117e166&dg=microsoft.public.outlook.calendaring